1.

The reaction Xto Products follows first order kinetics. In 40 minutes, the concentration of X changes from 0.1 M to 0.025M. The rate of reaction when concentration of X is 0.01 M is:

Answer»

`1.73 xx 10^(-4) M MIN^(-1)`
`3.47 xx 10^(-5) M min^(-1)`
`3.47 xx 10^(-4) M min^(-1)`
`1.73 xx 10^(-5) M min^(-1)`

SOLUTION :c) K = `(2.303)/t log a/(a-x)`
`=(2.303)/(40 "min") log (0.1M)/(0.025M)`
`(2.303)/(40"min") xx log4 = (2.303 xx 0.6021)/(40"min")`
`=0.03467min^(-1)`
RATE = k[x]
=`(0.03467 min^(-1)) xx (0.01M)`
`3.47 xx 10^(-4) M min^(-1)`


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